Several variants of the Sony S1 tablet have made their way into the hands of the FCC, racking up six model numbers in the process. The SGPT1111US/S, SGPT1112US/S, SGPT1111CA/S, SGPT1112CA/S, SGPT1113JP/S, and SGPT1114JP/S have all been listed for approval, with the actual differences between the group boiling down to country and most likely internal storage or color scheme. The US and CA versions (which we might assume are headed to the US and Canada) make no mention of cellular radio, but the JP listings sport WCDMA bands II and V support and an Ericsson F5521gw HSPA+ modem. Those specs seem to indicate AT&T or Rogers as a possible destination, though the JP in the model number suggests a Japanese release (if we continue to assume the letters designate region). Suppose we’ll just have to wait and see when the S1 rolls out alongside the S2 in the fall.